syzkaller login: [ 31.349529] BUG: Bad rss-counter state mm:0000000016b5848f type:MM_FILEPAGES val:33 [ 31.350746] BUG: Bad rss-counter state mm:0000000016b5848f type:MM_ANONPAGES val:22 [ 31.520637] ================================================================== [ 31.521574] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.522580] Read of size 8 at addr ffff8880094615c8 by task sshd/219 [ 31.523480] [ 31.523698] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.524577] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.525615] Call Trace: [ 31.525937] [ 31.526241] dump_stack_lvl+0x91/0xf0 [ 31.526736] print_report+0xcc/0x620 [ 31.527244] ? __virt_addr_valid+0x102/0x340 [ 31.527801] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.528445] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.529078] kasan_report+0xbe/0xf0 [ 31.529589] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.530237] vma_interval_tree_remove+0xc75/0xec0 [ 31.530871] vma_prepare+0xc54/0x11a0 [ 31.531405] __split_vma+0x5af/0x950 [ 31.531899] ? __pfx___split_vma+0x10/0x10 [ 31.532465] ? find_held_lock+0x2c/0x110 [ 31.533010] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.533636] ? lock_is_held_type+0x9f/0x120 [ 31.534227] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.534862] ? mtree_range_walk+0x632/0x900 [ 31.535465] ? mas_walk+0x5c7/0x7c0 [ 31.535965] do_vmi_munmap+0x1f1/0x2b0 [ 31.536494] mmap_region+0x1f9/0x2660 [ 31.536993] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.537600] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.538384] ? __pfx_lock_acquire+0x10/0x10 [ 31.538954] ? __pfx_mmap_region+0x10/0x10 [ 31.539535] ? security_mmap_addr+0x7d/0xa0 [ 31.540092] ? get_unmapped_area+0x1f5/0x3f0 [ 31.540675] do_mmap+0x854/0xf00 [ 31.541157] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.541683] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.542295] ksys_mmap_pgoff+0x3af/0x500 [ 31.542825] do_syscall_64+0x3f/0x90 [ 31.543350] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.544026] RIP: 0033:0x7f3ea038ed82 [ 31.544517] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 31.546801] RSP: 002b:00007ffd2e421598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.547778] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3ea038ed82 [ 31.548680] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3e9f7c8000 [ 31.549612] RBP: 00007f3e9f7c8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.550516] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564b76921ec0 [ 31.551434] R13: 00007ffd2e4215b0 R14: 00007ffd2e4215e0 R15: 00007ffd2e421940 [ 31.552362] [ 31.552671] [ 31.552896] Allocated by task 212: [ 31.553372] kasan_save_stack+0x22/0x50 [ 31.553900] kasan_set_track+0x25/0x30 [ 31.554435] __kasan_slab_alloc+0x59/0x70 [ 31.554982] kmem_cache_alloc+0x16b/0x370 [ 31.555550] vm_area_dup+0x20/0x160 [ 31.556030] __split_vma+0x170/0x950 [ 31.556523] split_vma+0xc6/0x110 [ 31.556981] mprotect_fixup+0x8d2/0xb30 [ 31.557541] do_mprotect_pkey+0x87e/0xd40 [ 31.558089] __x64_sys_mprotect+0x78/0xc0 [ 31.558653] do_syscall_64+0x3f/0x90 [ 31.559165] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.559871] [ 31.560103] Freed by task 202: [ 31.560528] kasan_save_stack+0x22/0x50 [ 31.561061] kasan_set_track+0x25/0x30 [ 31.561599] kasan_save_free_info+0x2b/0x50 [ 31.562174] __kasan_slab_free+0x10a/0x190 [ 31.562745] kmem_cache_free+0x10d/0x4d0 [ 31.563307] rcu_core+0x8c8/0x2860 [ 31.563770] __do_softirq+0x1b7/0x7d4 [ 31.564276] [ 31.564501] Last potentially related work creation: [ 31.565139] kasan_save_stack+0x22/0x50 [ 31.565680] __kasan_record_aux_stack+0x8e/0xa0 [ 31.566303] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.566969] remove_vma+0x139/0x170 [ 31.567460] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.568049] do_vmi_munmap+0x1f1/0x2b0 [ 31.568585] __vm_munmap+0x138/0x3a0 [ 31.569072] __x64_sys_munmap+0x59/0x80 [ 31.569614] do_syscall_64+0x3f/0x90 [ 31.570112] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.570827] [ 31.571050] The buggy address belongs to the object at ffff888009461570 [ 31.571050] which belongs to the cache vm_area_struct of size 168 [ 31.572635] The buggy address is located 88 bytes inside of [ 31.572635] freed 168-byte region [ffff888009461570, ffff888009461618) [ 31.574109] [ 31.574348] The buggy address belongs to the physical page: [ 31.575010] page:00000000c9cc11bf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9461 [ 31.576097] memcg:ffff888019495a01 [ 31.576531] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.577267] page_type: 0xffffffff() [ 31.577717] raw: 0100000000000200 ffff8880087a0c80 ffffea000032b080 000000000000000d [ 31.578663] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019495a01 [ 31.579578] page dumped because: kasan: bad access detected [ 31.580243] [ 31.580458] Memory state around the buggy address: [ 31.581034] ffff888009461480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.581922] ffff888009461500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.582799] >ffff888009461580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.583668] ^ [ 31.584345] ffff888009461600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 31.585251] ffff888009461680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.586114] ================================================================== [ 31.587189] Disabling lock debugging due to kernel taint [ 33.669494] BUG: Bad rss-counter state mm:00000000542a8a78 type:MM_FILEPAGES val:33 [ 33.670783] BUG: Bad rss-counter state mm:00000000542a8a78 type:MM_ANONPAGES val:22 [ 34.072084] BUG: Bad rss-counter state mm:0000000006952356 type:MM_FILEPAGES val:33 [ 34.072799] BUG: Bad rss-counter state mm:0000000006952356 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51185' (ECDSA) to the list of known hosts. 2023/06/21 04:14:22 fuzzer started 2023/06/21 04:14:22 dialing manager at localhost:36067 2023/06/21 04:14:22 checking machine... 2023/06/21 04:14:22 checking revisions... [ 34.764375] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:14:22 testing simple program... [ 34.808450] cgroup: Unknown subsys name 'net' [ 34.845875] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:14:21 Registers: info registers vcpu 0 RAX=1ffffffff0bc0764 RBX=ffffffff85e03b24 RCX=ffffffff8185af32 RDX=0000000000000000 RSI=ffffffff86141712 RDI=ffffffff85e03b20 RBP=ffffffff85e03b24 RSP=ffff8880146772f8 R8 =ffffffff86141712 R9 =ffff8880146773f0 R10=0000000000038001 R11=0000000000022457 R12=ffffffff85e03b24 R13=ffffffff85e03b20 R14=ffffffff85e03b20 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----A-C] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd94e0c0900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fd94d558cc0 CR3=000000000c644000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d4d72872dafac0f900000000000ae988 XMM05=557099fe5840d5f70000000000133180 XMM06=806171799158d9670000000000131f70 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86098097 RBX=0000000000000001 RCX=ffffffff86098092 RDX=0000000000000002 RSI=0000000000000007 RDI=ffffffff85d92c20 RBP=ffff88800e8270c0 RSP=ffff88800e826fa8 R8 =ffffffff86098092 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff88800e8270c8 R13=ffff88800e8270b0 R14=ffff88800e8270a9 R15=ffff88800e827068 RIP=ffffffff81130a72 RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9835fd9900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f9835fb8020 CR3=000000000e0f8000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000